yzeng1618 opened a new pull request, #12769:
URL: https://github.com/apache/seatunnel/pull/12769
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### Purpose of this pull request
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Concurrent JDBC writers can acquire row locks in different orders and
receive database transaction conflicts such as PostgreSQL 40P01. Sorting
records within one flush reduces the chance of a lock-order cycle, but it
cannot handle conflicts spanning multiple flushes or custom SQL paths. Retrying
without rolling back the whole transaction can also replay only part of the
transaction.
### Does this PR introduce _any_ user-facing change?
Detects PostgreSQL 40P01, standard 40001, and strictly matched Oracle
ORA-00060 transaction conflicts.
Retries only independent manual-commit flush transactions when the executor
can retain logical records and clear the driver's partially submitted batch.
Propagates conflicts from checkpoint and XA transaction scopes so the
upper-level recovery mechanism can replay the complete transaction.
Adds opt-in upsert_batch_key_ordered ordering for generated primary-key
upsert batches; the default remains false for compatibility.
Prevents failed child JDBC batches from being executed again during close.
Adds unit coverage and a PostgreSQL two-connection deadlock integration test.
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### How was this patch tested?
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https://github.com/apache/seatunnel/blob/dev/seatunnel-e2e/seatunnel-connector-v2-e2e/connector-cdc-mysql-e2e/src/test/resources/mysqlcdc_to_mysql.conf,
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### Check list
* [ ] If any new Jar binary package adding in your PR, please add License
Notice according
[New License
Guide](https://github.com/apache/seatunnel/blob/dev/docs/en/developer/new-license.md)
* [ ] If necessary, please update the documentation to describe the new
feature. https://github.com/apache/seatunnel/tree/dev/docs
* [ ] If necessary, please update `incompatible-changes.md` to describe the
incompatibility caused by this PR.
* [ ] If you are contributing the connector code, please check that the
following files are updated:
1. Update
[plugin-mapping.properties](https://github.com/apache/seatunnel/blob/dev/plugin-mapping.properties)
and add new connector information in it
2. Update the pom file of
[seatunnel-dist](https://github.com/apache/seatunnel/blob/dev/seatunnel-dist/pom.xml)
3. Add ci label in
[label-scope-conf](https://github.com/apache/seatunnel/blob/dev/.github/workflows/labeler/label-scope-conf.yml)
4. Add e2e testcase in
[seatunnel-e2e](https://github.com/apache/seatunnel/tree/dev/seatunnel-e2e/seatunnel-connector-v2-e2e/)
5. Update connector
[plugin_config](https://github.com/apache/seatunnel/blob/dev/config/plugin_config)
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